Square.



G. G. LORTZ.

SQUARE.

APPLICATION FILED JUNE 6, 1911d Patented July 29, 1913.

A Loeaeva.

CHARLES o. LoETz, or OMAHA, NEBRASKA, AssIGNoE 0E ONE-HALE 'ro WILLIAME.

LONG, 0E OMAHA, NEBRASKA.

SQUARE.

To all whom t may concern Be it known that I, CHARLES C. LoRTz, acitizen of the United States, residing at Omaha, in the county ofDouglas and State of Nebraska, have invented new and useful.Improvements in Squares, of which the following is a specification.

This invention relates to squares and more particularly to carpenterssteel squares, the object of the invention being to provide a steelsquare having the blades foldable upon one another so that they willoccupy small spa-ce in the tool chest and may be transported from placeto place conveniently.

A further object of the invention is to so construct the hinged parts ofthe square ltghat the strain is removed from the pivotal olt.

Further objects of the invention will appear as the following specificdescription is read in connection with the accompanying dra-wing, whichforms a part of this application, and in which- Figure 1 is afragmentary elevation showing the square in open position. Fig. 2 is asimilar view with the square in closed position. Fig. 3 is an insideelevation of the tongue. Fig. 4c 1s .a similar view of the blade.

Referring' more particularly to the drawing, 1 represents the blade ofthe square and 2 the opposite blade or tongue. The blade 1 is providedwith a right angularly eX- tending hinge member 3 which is circular, asat 1, on its outer edge. Formed on the right angular extension 3 .areribs 5 and 6 and between the ribs 5 and 6 an annular groove 7 and withinthe rib 6 a circular socket 8. Outside of the rib 5 the extension isreduced to form a circular track 9 for the rib 10 upon the tongue 2.rlhis rib 10 oorresponds with a similar rib 11 separa-ted therefrom by agroove 12 and inside of the rib 11, and separated therefrom by a groove13, is a central stud 14 adapted to engage the socket 8. The stud 111 iscentrally apertured and screw threaded to receive a pivoting screw 15which passes through a countersunk hole 16 arranged in the extension 3coincident with the socket 8.

Extending through the extension 3 and Speccaton of Letters Patent.

Application filed June 6, 1911.

Patented July 29, 1913.

Serial No. 631,506.

the end of the tongue 2 are suitable apertures 17 and 18, arranged atquartering intervals through the rib 5 and within the groove 12respectively. Vithin the apertures 18 of the stud 5 are permanentlypositioned and secured therein steel pegs or pins 19, said pins may besuitably secured in any well known manner, suoli as solder or the like.rIhese pins are adapted to register with the apertures 17 when thesquare is adjusted to either open or folded position. This function isaccomplished by the loosening of the pivoting screw 15 and by a slightlateral adjustment. The projecting portion of the steel pegs or pins 19may be readily withdrawn and inserted in the respective apertures 17 ofthe other blade member 2. by accomplishing this, a positive lockingaction is obtained between the parts 1 and 2 in either position.

Having thus described the invention, what I claim as new is A squarecomprising a pair of blades, one of said blades being provided with aright angular hinge extension having a circular outer edge; a bolt forpivoting the other blade to the hinge extension, a pair of relativelyspaced circular' ribs formed on the extension, one of said ribs beingprovided with a series of apertures, and the said ribs havingtherebetween an annular groove, a circular track disposed outside andconcentric with the rib having the apertures, the other blade beingformed with a. series of annular ribs and grooves adapted forinterlocking engagement with the ribs and grooves of said angularextension, the said other blade having a series of apertures disposed inone of its grooves and arranged at quartering intervals and pinspermanently seated in the apertures of the ribs and adapted to enter theapertures in the grooves of the other of said blades, whereby a positivelocking action is obtained between the blades in either open or closedposition.

In testimony whereof I ailix my signature in presence of two witnesses.

CHARLES C. LOR'IZ.

Witnesses:

R. S. PIERCE, W. L. KALINowsKI.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. C.

